Hinks, Arthur R. (Arthur Robert), 1873-1945 · Cambridge, University press · leaf 207
o the measured angles if the instrument is notperfectly stable during the course of the round ; and this cannotbe ensured absolutely. If we repeat the observation o{ A at theend of the round we ensure that the measure of the angle DO Ais independent of any settlement of the instrument that may ISO… … Fig. 19. the near concordance that there should be between the first andthe last settings on ^ is a measure of the stability of the instru-ment during the round. This is an important principle, to whichattention should be paid. There are, however, cases in which the simple processdescribed above…
Maps · Surveying
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